Malicious PDF — malware analysis report

Static analysis result for SHA-256 5403269eb8a8ceec…

MALICIOUS

PDF

41.6 KB Created: 2020-08-05 06:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4c00654a610d2166449b0798456e692 SHA-1: d040f06cbcc494e19094dd5e5a87547c4c8a80fd SHA-256: 5403269eb8a8ceecce0072acd0064234138e10fe0128ead9b566da94874289be
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. This suggests the document is part of a link farm or SEO poisoning campaign designed to redirect users to malicious sites. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=farmacos+analgesicos+opiaceos+pdf
    • http://files.restorationmassagebydiana.com/uploads/1/3/0/7/130738949/libawaw.pdf
    • http://files.norcrosspresbyterian.org/uploads/1/3/2/7/132740285/869507.pdf
    • http://files.godsvineyardchurch-birmingham.org/uploads/1/3/2/6/132681337/rejediv-sumidas-patiwefipinugaz.pdf
    • http://files.acpropertynetwork.com/uploads/1/3/1/6/131606758/5468176.pdf
    • http://files.teacher-on-the-road.com/uploads/1/3/0/9/130969404/1165df7ba7685ba.pdf
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/rolatoxa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7952/2714/files/vuxarokomojuvokom.pdf
    • https://cdn.shopify.com/s/files/1/0433/4357/7256/files/gisaxutegenene.pdf
    • https://cdn.shopify.com/s/files/1/0437/5638/8510/files/tuvuvukivas.pdf
    • https://cdn.shopify.com/s/files/1/0429/5812/7270/files/29233634552.pdf
    • https://cdn.shopify.com/s/files/1/0433/7857/3464/files/xujatekonagoxovej.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/calculus_graphical_numerical_algebraic_4th_edition_online_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/12346121068.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2768/files/83289944885.pdf
    • https://cdn.shopify.com/s/files/1/0432/0909/7384/files/zoxisotebifewabujewoze.pdf
    • https://cdn.shopify.com/s/files/1/0431/7154/5237/files/agriculture_for_upsc_prelims.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/nfc_analog_technical_specification.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/54861683089.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/bokuwiboso.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000651b.bin
239eba7ebb91cc71aa5920425532a9f44e1b07761ba6ee7b8cd9a27c4769c464		 pdf-font-stream PDF embedded font (sfnt) at offset 0x651B 5432 bytes
font_01_sfnt_off0000777f.bin
af9dfc6d80c0f18630880fcdaae44f8eff831f8c1f084c5b1a35d0b87a703f89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x777F 9960 bytes

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